Histamine is an organic nitrogenous compound involved in local immune responses communication, as well as regulating physiological functions in the gut...

the activity of histamine receptors in the body. In this sense of the word, antihistamines are subclassified according to the histamine receptor that they...

Histamine intolerance is a presumed set of adverse reactions (such as flush, itching, rhinitis, etc.) to ingested histamine in food. The mainstream theory...

The histamine receptors are a class of G protein–coupled receptors which bind histamine as their primary endogenous ligand. Histamine receptors are proteins...

called H1 blockers, are a class of medications that block the action of histamine at the H1 receptor, helping to relieve allergic reactions. Agents where...

Histamine is an organic compound that primarily functions in service of the human body's immune responses as well as for the regulation of many physiological...

histamine receptor belonging to the family of rhodopsin-like G-protein-coupled receptors. This receptor is activated by the biogenic amine histamine....

blockers, are a class of medications that block the action of histamine at the histamine H2 receptors of the parietal cells in the stomach. This decreases...

converted to histamine when bacterial growth occurs during improper storage. Subsequent cooking, smoking, or freezing does not eliminate the histamine. Diagnosis...

Histamine dihydrochloride (INN, trade name Ceplene) is a salt of histamine that is used as a drug for the prevention of relapse in patients diagnosed with...

The histamine H4 receptor, like the other three histamine receptors, is a member of the G protein-coupled receptor superfamily that in humans is encoded...

Histamine N-methyltransferase (HNMT) is a protein encoded by the HNMT gene in humans. It belongs to the methyltransferases superfamily of enzymes and...

H2 receptors are a type of histamine receptor found in many parts of the anatomy of humans and other animals. They are positively coupled to adenylate...

Histamine H3 receptors are expressed in the central nervous system and to a lesser extent the peripheral nervous system, where they act as autoreceptors...

allergic or not, a complex release of inflammatory mediators, including histamine from cutaneous mast cells, results in fluid leakage from superficial blood...

A histamine agonist is a drug which causes increased activity at one or more of the four histamine receptor subtypes. H2: Betazole and Impromidine are...

Cimetidine, sold under the brand name Tagamet among others, is a histamine H2 receptor antagonist that inhibits stomach acid production. It is mainly...

selective for the H1 receptor. Compared to other second-generation anti-histamines, cetirizine can cause drowsiness. Second-generation antihistamines that...

second-generation antihistamine and takes effect by selectively inhibiting the histamine H1 receptor, preventing these allergic reactions. Bilastine has an effectiveness...

breathes in nebulized methacholine or histamine. Thus the test may also be called a methacholine challenge test or histamine challenge test respectively. Both...

medication. Betahistine is a strong antagonist at histamine H3 receptors and a weak agonist at histamine H1 receptors. Betahistine has two mechanisms of...

1.4.3.22) involved in the metabolism, oxidation, and inactivation of histamine and other polyamines such as putrescine or spermidine. The enzyme belongs...

H1 antihistamine. It is specifically a potent inverse agonist of the histamine H1 receptor. The drug is also commonly described as possessing weak anticholinergic...

classified as a second-generation antihistamine and works by blocking histamine H1-receptors. Levocetirizine was approved for medical use in the United...

The underlying mechanism typically involves histamine or bradykinin. The version related to histamine is due to an allergic reaction to agents such...

first-generation H1-antihistamine and it works by blocking certain effects of histamine, which produces its antihistamine and sedative effects. Diphenhydramine...

or breastfeeding is safe. Hydroxyzine works by blocking the effects of histamine. It is a first-generation antihistamine in the piperazine family of chemicals...

Famotidine, sold under the brand name Pepcid among others, is a histamine H2 receptor antagonist medication that decreases stomach acid production. It...

resident cell of connective tissue that contains many granules rich in histamine and heparin. Specifically, it is a type of granulocyte derived from the...

thought to be the result of histamine being released by mast cells on the surface of the skin. Despite the lack of antigens, histamine causes the skin to swell...